Screen for lubricator-pumps.



1. D. HARRIS.

SCREEN FOR I UBHICATOR PUMPS.`

APPLICATION FILED JUNE Il. 19H.

Patented July 2, 1918.

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.Iosnrnin HARRIS, ornn'rnorn MICHIGAN, AssIGnoa ro Meconn MANUFACTURING CoMrAMY, ornnfrnorr, MICHIGAN, A CORPORATION or MAINE;

SCREEN FOR LUBRICATOB-PUMPS.

Specification of Letters Patent.

Application filed June 11, 1917.. Serial No. 174,022.y

To all whom it may concrnf' Be it known that 1, JOSEPH l),` HARRIS, a

citizen of the United States, residing at Detroit, in the county of Wayne and State-of Michigan, have invented certain new and useful Improvements in Screens for Lubricator-Pumps; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to force feed lubrioators and more particularly to that general type of force feed lubricator disclosed and claimed in Letters Patent 1,145,515, grant-ed to William J. Schlacks of date July 6 1915.

7lllubricators of this type have suction tubes drawing the oil from the bottom of the reservoir, and it has been customary hitherto to provide wire net strainers at the ends of such suction tubes to revent solid or other foreign substances from passing with the oil to the journals. lin practice these wire net strainers would be clogged up frequently. When they were stopped up, say to 25% to 50% of their conducting capacity the pump suction would be very seriously interfered with, and the pump could be no longer relied upon to supply the proper amount of lubricant. "I

My invention provides a decidedly 1 mproved form of screen that is non-clogging and does not use wire netting or close meshed fabric of any kind. The invention consists of providing a reservoir on or at its bottom with a raised well from which the suction tube draws the oil, and in providing the suction tube with a hood or sort of umbrella shield that surrounds the upper portion of this well with clearance, permitting How of oil, and terminates above the bottom of the well but materially below the level of the upper extremity of the said well.

The invention applied to a force feed lubricant pump of the character above noted is illustrated in the single view drawing. 'lhe pump illustrated is of the multiple piston type and, as shown, involves a box-like oil reservoir 1, a plurality of pump cylinders Q depending from the top thereof, pump plungers 3 working in said cylinders and connected in pairs by cross head Ll; suction tubes 5 that are in communication with the lower ends of the cylinders 2, and with dise Charg conduise; check valves? and et@ permit the flow of oil from suction tubes 5` outthrough discharge conduit 6, but checklng reverse flows; rotary cam shaft 9 and cam actuated plungers 10 for the cross heads 4l, all of which parts are of the usual construction and operate in the customary way, and hence for the purposes of this case need not be further considered.

1n accordance with my invention raised oil wells 11 are formed on the bottomof the reservoir 1, and rise above and surround the lower ends of the cooperating suction tubes 5. To the suction tubes 5 are secured the hoods or umbrella shields which may be conveniently pressed from sheet metal and which, as stated, surround the upper ends of the wells 11, with clearance, permitting the flow of oil into the wells whenever the level of the oil in the reservoir is above the top of the said wells. An air Ventilating tube 13 extends from the top of each hood 12 and terminates near the top of the reservoir. r1`hese vent tubes permit the pressure within the hood always to be equalized with the pressure within the reservoir, so that when the oil is pumped down to the level of the upper extremity of the well or wells 11 no more will How into said well or wells, whether or not the pump is in action.

bviously, these hoods or umbrella shields 12 will prevent the precipitation of dirt or solid matter into the well and will prevent floating foreign matters from get ting into the well when the level of the oil in the reservoir is low, For example, when the level of the oil is close to the top of the wells such light matters are prevented from Howing into the wells by the emersed walls of the hood, hence there is no time when any foreign matters, either heavier or lighter than the oil, can get into the oil well or wells, and, moreover, such foreign matters cannot possibly clog the screen or shield or any of the passages through the pump. 0n the contrary, any materials heavier than the oil will settle to the bottom of the reservoir and any materials lighter than the oil will always Heat up to the surface of the oil and this surface of the oil will always be above the lower edge of the hood. Uf course, from time to time the reservoir may be drained and cleaned of collected foreign matters.

What ll claim is:

1, 1n a luhrieator pump,- the combination but spaced therefrom and extended to e level below lthe top of said well, and en a-ir porlzioh of Seid well. 15 Iutestmony whereof I ax my signature in presence of two witnesses.

JOSEPH D. HARRIS.

Witnesses:

H. O. MARTIN, RUTH CROSSJSAN. 

